Before you do the deed it may be worth reading today's posting on the subject, on the Horizon Forum. Only a couple of inputs so far but nough to suggest there are no discernible benefits from SP2 with DX9 but a few downside effects.
I'm definitely hanging on until there's more feedback, we've only had it a day and my system runs FSX acceptably with SP1.
Gerry Winskill franklyn fisher wrote:
I got nothing to lose, will try installing SP2 on my system now, I don't have GenX installed, just some addons, and a tweaked Config file.If you hear me yelling in half an hour, that because I am reinstalling FSX.Frank F